CVE-2022-39173: Buffer Overflow
First published: Thu Sep 29 2022(Updated: )
In wolfSSL before 5.5.1, malicious clients can cause a buffer overflow during a TLS 1.3 handshake. This occurs when an attacker supposedly resumes a previous TLS session. During the resumption Client Hello a Hello Retry Request must be triggered. Both Client Hellos are required to contain a list of duplicate cipher suites to trigger the buffer overflow. In total, two Client Hellos have to be sent: one in the resumed session, and a second one as a response to a Hello Retry Request message.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| WolfSSL wolfssl | <5.5.1 |
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Reference Links
- http://packetstormsecurity.com/files/169600/wolfSSL-Buffer-Overflow.html
- http://seclists.org/fulldisclosure/2022/Oct/24
- https://blog.trailofbits.com/2023/01/12/wolfssl-vulnerabilities-tlspuffin-fuzzing-ssh/
- https://github.com/wolfSSL/wolfssl/releases
- https://www.wolfssl.com/docs/security-vulnerabilities/
Frequently Asked Questions
What is the vulnerability ID of the buffer overflow in wolfSSL?
The vulnerability ID is CVE-2022-39173.
What is the severity of CVE-2022-39173?
The severity of CVE-2022-39173 is high with a severity value of 7.5.
How can malicious clients exploit CVE-2022-39173?
Malicious clients can exploit CVE-2022-39173 by causing a buffer overflow during a TLS 1.3 handshake.
Which version of wolfSSL is affected by CVE-2022-39173?
wolfSSL versions up to but excluding 5.5.1 are affected by CVE-2022-39173.
Is there a fix available for CVE-2022-39173?
Yes, updating to wolfSSL version 5.5.1 or later will fix CVE-2022-39173.
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